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 Electronic Circuits Schematics Projects

# Delay switching for power amplifiers

Category: Power Supply Circuits / AC to DC & DC to DC
This circuit is also crossed to: Amplifiers , Relay Circuits , Switching Circuits , Delay Circuits
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This delay can be used in power amplifiers, to prevent the fuses fail when the amplifier is turned on. The circuit is very simple with a relay which turned on when C2 and C3 are charged. If the relay has not been applied, the resistors used to control connected to feed. If after some time the relay attracts the bridge resistors. Watch out for your own safety when building this circuit. On the whole circuit is power. F1 should be the value of having the fuse that normally would be used.R1, R2 = 470 kOhm R3 = 220 ? R4-R7 = 10 ? / 5 W wirewound C1 = 330 nF 400 V ~ X2-type C2-C3 = 470 uF 40 - 63V B1 = B250C1500 RE1 = 250 ? 24 V 1200 V / 8 A Contacts F1 = see text visit page.

R1, R2 = 470 kOhm R3 = 220 ? R4-R7 = 10 ? / 5 W wirewound C1 = 330 nF 400 V ~ X2-type C2-C3 = 470 uF 40 - 63V B1 = B250C1500 RE1 = 250 ? 24 V 1200 V / 8 A Contacts F1 = see text http://www.circuitsonline.net/schakelingen/93/voedingen/inschakelvertraging.html

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